Nissan Altima 2007-2012 Service Manual: Key cylinder switch

Description

For vehicles equipped with LH and RH anti-pinch system, the main power window and door lock/unlock switch detects condition of the door key cylinder switch and transmits to BCM as the LOCK or UNLOCK signal.

For vehicles equipped with LH anti-pinch system only, the front door lock assembly LH (key cylinder switch) transmits the LOCK or UNLOCK signal directly to the BCM.

Component Function Check

1.CHECK DOOR KEY CYLINDER SWITCH INPUT SIGNAL

Check KEY CYL UN-SW, KEY CYL UN-SW in “DATA MONITOR” mode for “POWER DOOR LOCK SYSTEM” with CONSULT-III. Refer to DLK-231, "Work Flow".

Is the inspection result normal? YES >> Key cylinder switch is OK.

NO >> With LH and RH anti-pinch, refer to DLK-305, "Diagnosis Procedure (With LH and RH Anti- Pinch)".

NO >> With LH anti-pinch only, refer to DLK-306, "Diagnosis Procedure (With LH Anti-Pinch Only)".

Diagnosis Procedure (With LH and RH Anti-Pinch)

1.CHECK DOOR KEY CYLINDER SWITCH INPUT SIGNAL

1. Turn ignition switch ON.

2. Check voltage between main power window and door lock/ unlock switch connector and ground.

Is the inspection result normal? YES >> Replace main power window and door lock/unlock switch. Refer to PWC-91, "Removal and Installation".

NO >> GO TO 2

2.CHECK DOOR KEY CYLINDER SIGNAL CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect main power window and door lock/unlock switch connector and front door lock assembly LH (key cylinder switch) connector.

3. Check continuity between main power window and door lock/ unlock switch connector and front door lock assembly LH (key cylinder switch) connector.

4. Check continuity between main power window and door lock/ unlock switch connector and ground.

Is the inspection result normal? YES >> GO TO 3

NO >> Repair or replace harness.

3.CHECK DOOR KEY CYLINDER SWITCH GROUND CIRCUIT

Check continuity between front door lock assembly LH connector and ground.

Is the inspection result normal? YES >> GO TO 4

NO >> Repair or replace harness.

4.CHECK DOOR KEY CYLINDER SWITCH

Check door key cylinder switch.

Refer to SEC-318, "Component Inspection".

Is the inspection result normal? YES >> Check intermittent incident. Refer to GI-42, "Intermittent Incident".

NO >> Replace front door lock assembly LH (key cylinder switch). Refer to DLK-451, "FRONT DOOR LOCK : Removal and Installation".

Diagnosis Procedure (With LH Anti-Pinch Only)

1.CHECK DOOR KEY CYLINDER SWITCH INPUT SIGNAL

1. Turn ignition switch ON.

2. Check voltage between BCM connector and ground.

Is the inspection result normal? YES >> Replace main power window and door lock/unlock switch. Refer to PWC-91, "Removal and Installation".

NO >> GO TO 2

2.CHECK DOOR KEY CYLINDER SWITCH GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect front door lock assembly LH (key cylinder switch) connector.

3. Check continuity between front door lock assembly LH (key cylinder switch) connector and ground.

Is the inspection result normal? YES >> GO TO 3

NO >> Repair or replace harness.

3.CHECK DOOR KEY CYLINDER SIGNAL CIRCUIT

1. Disconnect BCM connector M18.

2. Check continuity between front door lock assembly LH (key cylinder switch) connector and BCM connector M18.

3. Check continuity between front door lock assembly LH (key cylinder switch) connector and ground.

Is the inspection result normal? YES >> GO TO 4

NO >> Repair or replace harness.

4.CHECK DOOR KEY CYLINDER SWITCH

Check door key cylinder switch.

Refer to SEC-318, "Component Inspection".

Is the inspection result normal? YES >> Check intermittent incident. Refer to GI-42, "Intermittent Incident".

NO >> Replace front door lock assembly LH (key cylinder switch). Refer to DLK-451, "FRONT DOOR LOCK : Removal and Installation".

Component Inspection

COMPONENT INSPECTION

1.CHECK DOOR KEY CYLINDER SWITCH

Check front door lock assembly LH (key cylinder switch).

Is the inspection result normal? YES >> Key cylinder switch is OK.

NO >> Replace front door lock assembly LH (key cylinder switch). Refer to DLK-451, "FRONT DOOR LOCK : Removal and Installation".

    Key slot illumination
    Description Blinks when Intelligent Key insertion is required. Component Function Check 1.CHECK FUNCTION Check key slot illumination (“KEY SLOT ILLUMI”) Active Test mode. Is the inspectio ...

    Horn
    Description Horn (high/low) is located inside of front bumper and operates when theft warning system is in alarm phase. Component Function Check 1.CHECK FUNCTION 1. Select HORN in “ACTIVE TES ...

    Other materials:

    Front passenger air bag module
    Removal and Installation REMOVAL CAUTION: • Before servicing, turn ignition switch OFF, disconnect both battery terminals and wait at least three minutes. • Do not use air tools or electric tools for servicing. • Always work from the side of air bag module. Do not work from the fro ...

    Precaution
    Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER" The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along with a front seat belt, helps to reduce the risk or severity of injury to the driver and front ...

    B2601 shift position
    Description BCM confirms the shift position with the following 2 signals. • CVT selector lever • P position signal from IPDM E/R (CAN) DTC Logic DTC DETECTION LOGIC NOTE: • If DTC B2601 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to SEC-4 ...